The complete mitochondrial genome of the copepod<i>Calanus glacialis</i>

Choquet, Marvin; Monteiro, Homére Alves; Bengtsson‐Palme, Johan; Hoarau, Galice

doi:10.1080/23802359.2017.1361357

Cited by 2 publications

(1 citation statement)

References 7 publications

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“…Such extraordinary lengths of the C. glacialis and C. finmarchicus mitogenomes are caused by an unusual length of NCRs, a feature that was also observed in C. sinicus 23 . The 20,674 bp long sequence of C. glacialis mitochondrial genome, announced recently 28 , is almost identical to contig 2 presented by us (>99% sequence similarity), extended at 3’ end with low complexity repeatable region of substantial length, therefore contrary to the description given by the authors, we believe that in fact this contig does not contain the complete set of mitochondrial genes (compare Fig. 1a ).…”

Section: Discussionsupporting

confidence: 48%

Mitochondrial genomes of the key zooplankton copepods Arctic Calanus glacialis and North Atlantic Calanus finmarchicus with the longest crustacean non-coding regions

Weydmann

Przyłucka

Lubośny

et al. 2017

Sci Rep

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We determined the nearly complete mitochondrial genomes of the Arctic Calanus glacialis and its North Atlantic sibling Calanus finmarchicus, which are key zooplankton components in marine ecosystems. The sequenced part of C. glacialis mitogenome is 27,342 bp long and consists of two contigs, while for C. finmarchicus it is 29,462 bp and six contigs, what makes them the longest reported copepod mitogenomes. The typical set of metazoan mitochondrial genes is present in these mitogenomes, although the non-coding regions (NCRs) are unusually long and complex. The mitogenomes of the closest species C. glacialis and C. finmarchicus, followed by the North Pacific C. sinicus, are structurally similar and differ from the much more typical of deep-water, Arctic C. hyperboreus. This evolutionary trend for the expansion of NCRs within the Calanus mitogenomes increases mitochondrial DNA density, what resulted in its similar density to the nuclear genome. Given large differences in the length and structure of C. glacialis and C. finmarchicus mitogenomes, we conclude that the species are genetically distinct and thus cannot hybridize. The molecular resources presented here: the mitogenomic and rDNA sequences, and the database of repetitive elements should facilitate the development of genetic markers suitable in pursuing evolutionary research in copepods.

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Section: Discussionsupporting

confidence: 48%

Mitochondrial genomes of the key zooplankton copepods Arctic Calanus glacialis and North Atlantic Calanus finmarchicus with the longest crustacean non-coding regions

Weydmann

Przyłucka

Lubośny

et al. 2017

Sci Rep

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Population Genomics of Marine Zooplankton

Bucklin

DiVito

Smolina

et al. 2018

Population Genomics

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The exceptionally large population size and cosmopolitan biogeographic distribution that distinguish many -but not all -marine zooplankton species generate similarly exceptional patterns of population genetic and genomic diversity and structure. The phylogenetic diversity of zooplankton has slowed the application of population genomic approaches, due to lack of genomic resources for closelyrelated species and diversity of genomic architecture, including highly-replicated genomes of many crustaceans. Use of numerous genomic markers, especially single nucleotide polymorphisms (SNPs), is transforming our ability to analyze population genetics and connectivity of marine zooplankton, and providing new understanding and different answers than earlier analyses, which typically used mitochondrial DNA and microsatellite markers. Population genomic approaches have confirmed that, despite high dispersal potential, many zooplankton species exhibit genetic structuring among geographic populations, especially at large ocean-basin scales, and have revealed patterns and pathways of population connectivity that do not always track ocean circulation. Genomic and transcriptomic resources are critically needed to allow further examination of micro-evolution and local adaptation, including identification of genes that show evidence of selection. These new tools will also enable further examination of the significance of small-scale genetic heterogeneity of marine zooplankton, to discriminate genetic "noise" in large and patchy populations from local adaptation to environmental conditions and change.

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The complete mitochondrial genome of the copepodCalanus glacialis

Cited by 2 publications

References 7 publications

Mitochondrial genomes of the key zooplankton copepods Arctic Calanus glacialis and North Atlantic Calanus finmarchicus with the longest crustacean non-coding regions

Mitochondrial genomes of the key zooplankton copepods Arctic Calanus glacialis and North Atlantic Calanus finmarchicus with the longest crustacean non-coding regions

Population Genomics of Marine Zooplankton

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